Request for information – FOI133351
Thank you for your e-mail of 21 January 2013, requesting:
The sole purpose for my inquiry to the Ordnance Survey was to ascertain whether the "dashed line" on the Ordnance Survey map in question, historical or otherwise, portrayed a physical (pertaining to nature or natural production) feature at this specific location, being, xxxxxx (part Parcel number xxx).
You have confirmed that a feature is in existence due to the very fact that there is a rise and fall/less 0.3 meters in height in the surface level, being totally visible at this site.
I am aware that "dashed lines" on OS current mapping generally depict the metaled road edge kerbing.
On reading the literature on this subject a Digital Map Feature Coding (also known as Layering) should be recorded on this particular feature due to this feature now established to be in existence.
Question: Is there a feature code listed for the above?
Ordnance Survey does hold some of the information to respond to your request.
Firstly, regarding your statement: ‘You have confirmed that a feature is in existence due to the very fact that there is a rise and fall/less 0.3 meters in height in the surface level, being totally visible at this site’ – we clarify that the feature shown in the large scale data is shown because there is a corresponding real world feature in existence and it is shown as a non-obstructing feature, because it is not an obstruction at ground level, and is therefore less than 0.3m in height.
Regarding your information request, Ordnance Survey no longer represents feature codes in our large scale data, but under the duty to provide advice and assistance (Section 16 of the FOIA) we can advise that we detail ‘forms and functions’ against certain features.
The edge of the road to which you refer is represented by a feature that has a baseform of ‘built non obstruction or limit’ with a function of ‘bounding public road’ and a feature group of ‘Topography+Line+Normal’. These baseforms and functions are only found in our base data.
In the OS MasterMap® product, roadside is a feature type of topographic line with a physical presence of edge/limit. This information can be found in our OS MasterMap real-world object catalogue PDF.
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